TITLE

Large differences in land use emission quantifications implied by definition discrepancies

AUTHOR(S)
Stocker, B. D.; Joos, F.
PUB. DATE
January 2015
SOURCE
Earth System Dynamics Discussions;2015, Vol. 6 Issue 1, p547
SOURCE TYPE
Academic Journal
DOC. TYPE
Article
ABSTRACT
The quantification of CO2 emissions from anthropogenic land use and land use change (eLUC) is essential to understand the drivers of the atmospheric CO2 increase and to inform climate change mitigation policy. Reported values in synthesis reports are commonly derived from different approaches (observation-driven bookkeeping and process-modelling) but recent work has emphasized that inconsistencies between methods may imply substantial differences in eLUC estimates. However, a consistent quantification is lacking and no concise modelling protocol for the separation of primary and secondary components of eLUC has been established. Here, we review the conceptual differences of eLUC quantification methods and apply an Earth System Model to demonstrate that what is claimed to represent total eLUC differs by up to ∼20% when quantified from ESM vs. offine vegetation models. Under a future business-as-usual scenario, differences tend to increase further due to slowing land conversion rates and an increasing impact of altered environmental conditions on land-atmosphere fluxes. We establish how coupled Earth System Models may be applied to separate component fluxes of eLUC arising from the replacement of potential C sinks/sources and the land use feedback and show that secondary fluxes derived from offine vegetation models are conceptually and quantitatively not identical to either, nor their sum. Therefore, we argue that synthesis studies and global carbon budget accountings should resort to the "least common denominator" of different methods, following the bookkeeping approach where only primary land use emissions are quantified under the assumption of constant environmental boundary conditions.
ACCESSION #
101848606

 

Related Articles

  • Reflections—Carbon Pricing in Practice*. Tietenberg, Tom H. // Review of Environmental Economics & Policy;Jul2013, Vol. 7 Issue 2, p313 

    Carbon pricing is a broad term that encompasses two policy approaches: emissions trading and carbon taxation. Emissions trading places a cap on the aggregate emission level and allows the market to determine the price, whereas carbon taxation sets the price and allows the market to determine the...

  • Climate challenges to Africa, from Bali to Copenhagen.  // OECD Journal: General Papers;2012, Vol. 2012 Issue 4, p113 

    The article focuses on the challenges faced by the government leaders in the adaptation, technology development, and financial resources of climate change measures. It notes the agreement of government leaders of a comprehensive set of actions for the least-developed countries that need to...

  • Modeling Climate Feedbacks Based on Short-Term Climate Variations.  // CO2 Science;6/19/2013, Vol. 16 Issue 25, p5 

    The article discusses research on differences in global climate models' estimates of feedbacks. It references a study by S. Koumoutsaris, published in the "Tellus A" online journal. Koumoutsaris says the disagreement in feedback estimates of global climate models causes in part the uncertainty...

  • Nations to draft parts of climate deal by 2014.  // ENDS (Environmental Data Services);Dec2012, Issue 455, p7 

    The article reports that governments have agreed to a new package of measures called the Doha Gateway which aims to reach a global climate deal by 2015 to be implemented in 2020. According to the author, under the Durban Platform of 2011, governments agreed to reach a global climate deal by the...

  • Estado y prospectiva de las posibilidades de mitigación de impacto del cambio climático en la región Costa Atlántica. Guerrero Gutiérrez, Reinaldo; de Dios Flórez Díaz, Juan; García García, Luz Elena // Papel Político;ene-jun2014, Vol. 19 Issue 1, p121 

    The University of Manizales, through the Center for Research on Environment and Development (CIMAD) and the Masters in Sustainable Development and Environment, develops and implements the research project "State and prospects of possibilities for adaptation and mitigation of the impact of...

  • Comment on "Carbon farming in hot, dry coastal areas: an option for climate change mitigation" by Becker et al. (2013). Heimann, M. // Earth System Dynamics Discussions;2013, Vol. 4 Issue 2, p869 

    Becker et al. (2013) argue that an afforestation of 0.73 109 ha with Jatropha curcas plants would generate an additional terrestrial carbon sink of 4.3 PgC yr-1, enough to stabilise the atmospheric mixing ratio of carbon dioxide (CO2) at current levels. However, this is not consistent with the...

  • International developments in carbon pricing. Castellas, Peter // EcoGeneration;Oct2013, Issue 78, p68 

    The article discusses International developments in carbon pricing and its relevance to global emissions and climate. Topics include Australia's recent shift to an emissions trading scheme, the World Bank Partnership for Market Readiness Program and the carbon market in China and the steps being...

  • Bottom-up Mitigation of Global Climate Change. Tomkiewicz, Micha; Scarlatos, Lori // International Journal of Climate Change: Impacts & Responses;2013, Vol. 4 Issue 1, p37 

    The talk will be based on a new online/offline game/simulation (Intelligent Energy Choices (IEC)) that was designed to provide educators at high schools and college levels and engage general public with an interactive, interesting, tool that allows users to "control" their countries and by doing...

  • Climate Change Mitigation: Carbon Tax -- Is it the Better Answer for Australia? Xynas, Lidia // Australian Tax Forum;Jul2011, Vol. 26 Issue 3, p339 

    This paper discusses the domestic and global obligations Australia is facing with respect to its climate change mitigation obligations. Because of the 'enhanced greenhouse effect' caused by human activity, climate change has become a global issue that requires collective support and action to...

Share

Read the Article

Courtesy of THE LIBRARY OF VIRGINIA

Sorry, but this item is not currently available from your library.

Try another library?
Sign out of this library

Other Topics